How to move one whos referral I am ?

Hi,
1 month ago one of my friend send invitation for top11 to me and after that i joined top11 game :), So i'm his referral. But now level-2 we are the same League and opponent each other. Now he support my against teams in every match :mad:.. So now I want to remove him from my list but there is no option to remove him :confused: as other friends. So please help me "How to remove him from my list" and I d'nt wanna give him any advantage of mine.

He's a friend on Facebook, too, right? The thing is, you have to remove him as friend there.

You could tank and be a level below him, or take over a Team on a different level to not be in the same League.